Blackbird, chopper gunner, dogs. This is of course for those that have no problem attaining 8 kills. I always get up to the highest skillstreaks then unleash the dogs. While the dogs are out obviously run and gun the enemy team while they are distracted. If I happen to get killed then after the dogs are done you can use chopper gunner to push them back further. After that use the blackbird to get back up to an 8+ killstreak and do it all over again. As long as you get that blackbird it makes it pretty easy since you know exactly how to go at them.